Uno is a 1943 tango with lyrics by Enrique Santos Discépolo and music by Mariano Mores. It tells the story of existential fatigue and heartbreak as a man who fears loving again after being hurt struggles along a path promised by dreams, only to end up without a heart. The first notable performance was by Libertad Lamarque in the 1943 film El fin de la noche, helping to establish the song as a tango standard. Over the years it has been widely covered and appears on albums by artists such as Plácido Domingo in 1981, Julio Iglesias in 1992 and 1996, and Luis Miguel in 1997. The song has also inspired multilingual versions, including French, Italian, and Portuguese adaptations like Je oublie que je t'aime, se ora avessi un po' di te, and Sonho Triste.
